1. Institute of Infection, Immunity and Inflammation; College of Medical, Veterinary and Life Sciences; University of Glasgow; Glasgow G12 8TA UK
2. Faculty of Health and Medical Sciences; University of Surrey; Guildford GU2 7XH UK
3. Immunity and Infection Division; The Roslin Institute and R(D)SVS; The University of Edinburgh; Easter Bush Midlothian EH25 9RG UK
4. Faculty of Veterinary Medicine; Kafrelsheikh University; 33516 Kafr el-Sheikh Egypt
5. Institute of Molecular and Cell Biology; College of Medical, Veterinary and Life Sciences; University of Glasgow; Glasgow G12 8TA UK
6. School of Chemistry and Molecular Biosciences and Australian Infectious Diseases Research Centre; University of Queensland; St. Lucia Qld 4072 Australia
7. School of Life Sciences; College of Medical, Veterinary and Life Sciences; University of Glasgow; Glasgow G12 8TA UK
8. Department of Microbiology and Immunology; Loyola University Chicago; Stritch School of Medicine; 2160 S. First Ave. Bldg. 105 Maywood IL 60153 USA